Measuring instrument



Sept. 20, 1927..

s. PUTRA MEASUR; NG INSTRUMENT Filed Oct. 28, 1926 2 Sheets-Sheetl 0 lull mmex || lll 6 lulu c WEE:

I 80 m .nM-NN I N N a @Non nu# Se l I p 20 927 s. PUTRA,

MEASURING INSTRUMENT 2 Sheets-Sheet 2 F'i'led Oct. 28, 1925 Patented Sept.l ze, 192?.

'sAiviUEL P TRA. oFv Lansronn,V PENNsYLvANiA.

l y v MEAsURINe ,INSTRUMEN'n lpplzcationv filed ctobere28, 1926. ySerial No. 144,887.

rIhis invention relates .to`r new and useful improvementsin carpenters tools,fand particularly tosquares for marking rafter cuts. .The principal object of the invention isto provide a device of this character which can be easily and yquickly,ir set to the pitch of the roof toV befbuiltand .from such setting the carpenterfmay mark the top of a rafter for the plumb cut, the bottom .of the raf-ter for the Afoot cut, land .the step cut, adjacent the foot cut, which receives the'wall plate, without a .resettin of the parts :ofthe tool. 1Another object is .to provide a tool of this character .by means ofwhich any unknown element of'measurement, of the roof ot a house may be quickly obtained 'upon-knowl kedge of any one .or more of the measuren'ients thereof. f v i Another object is to provide a toolof this character by means of which the end cuts of the various rafters usedy in roof.; may be easily and quickly obtained, as Well as to ascertain the lengths of the various rafters.

Other objects and advantages will be ap-y parent from the following description when taken in connection with the accompanying drawings.

1n the drawings: Figure 1 is a top plan View of the tool. Figure 2 is a bottom plan view of the same. Figure 3 is an enlarged transverse sectional view, on the line 3--3 of Figure 1, passing throughthe clamping bolt of the arms ofthe tool.

.Figure 4 shows how the tool is used for marking the different cuts of va common rafter. y

Figure 5 is a longitudinal' sectional View on the line 5-5 of Figure 1.

Figure 6 is a plan 'view of a stairway stringer showing the marks Vfor the riser and f Referring particularly to the accompanying drawings, 10 represents an elongated 45 channel member, forming the main or body portion of the tool, said member having the Y oifset extensions 11 and 12, at theopposite V ends thereof. kFormed longitudinally and disposed; The loWerface/of the arm 15 has the shoulder 15, formed on its pivoted end, which extends transversely. thereof, and is engaged by the adjacent edge of the arm 14 to maintain the latterin a position .at right angles to the former. One longer Wall of the slot 16. is beveled, and one side of the said angular portion of the bolt shank is correspondinglyv beveled for engagement with the said slotwall. A wingednut 19 is engaged on the bolt 18 for clamping the armsV in different adjusted positions.v Pivotally connectedl to the arm 15, adjacent the inner end thereof, is a link 20, the lotherlend vof the link being offset, as shown at 21and provided with 'a threaded opening in which .is dlsposeda screw 22, said screw: being also engaged through the plates 28, arranged on opposite 'faces of the member 10,y and the slot of said member. Eachv of the'platesisprovided with-the tongues 24 which engage in the slotto properly guide the plates longitudinally of the slot. One side of each of the plates 23 is curved, While the other one is straight, the straight side, as shown at 25, being arranged to register with the graduation marks on the member 10. The marks on the top face of the member indicate, at 34, degrees from 0 to 180; at 35, pitch per foot run, from one-quarter to eighteen inches, which gives top and bottom cuts for common rafters; at 36, cuts for sheathing of hip or valley and shingles; at 37, side cuts of jack rafters at 38, side cuts of hip and valley rafters; and at 39, top and bottom cuts of hip and valley rafters. Carried by one side of the member 10, and visible through a slot 26 in said side, is a spirit level 27. The plate 28, and the top plate of the member are secured by means of bolts 29, and may be readily removed, so that another plate, having different markings, may be substituted. The arm 14 is approximately tenV inches in length, and has its faces marked with various subdivisions of the inches. The arm 12 may be longer or shorter.

Attention is called to Figure 4, wherein the use of the tool, for marking the different cuts of a rafter, is shown. The arms 14 and are set to extend at right angles to each other. The operator then moves the member 10 until the plates 23 register with the marks indicating the pitch of the roof to be built. The member is then placed against the edge ofthe rafter and a line drawn across one the edge of the arm 14. This e r l ge,-

Vsents the level of the building,`t-1at 1s ori- Zontal to 'the ground dine. 1n the edgeof the rafter there are made the intersectin 1I'iaarls "c vand "CZ, aldng which'lthecarp'ent r jsawslto remove the :triangular hlook-e, 'lea'v- Sing La. correspondingly ,shaped lntellf in v-whlloh Y .is-received zthe top plateof gtlie wall Aof eth .build-ing, .whereby the lowernendo'f the raf-ter :isI pfroperly supported.t The .tool is :then slipped'itoith'e' :other .end of lthe ruiter, .and .a mark f Yiliade therezcrosa for the' .pluvmb eut, vsaid markA being parallel avidi-:the Ymark Ian, and .representing "tlienelined -aee Awhich Willrestagainstfthemidge vpole ofthe roof. A

.To mark ojastiing for a staircase, the ,toollis fused inthe manner just deseribed with respect to the `marks fc and d,1and vmarks and yhmade :on the side face of fthe strin i'epresenti'ngthe risers and A,treads .of t "e steps. In .the extension 12 there is formed r a -smallopening .1911),v .and in the outer end of .the arm 14 there :is formedl asimilar opening 31. In the opposite' lenld WallsA df the channel member IO there are formed the asva x'elfor transl Vllle I have described the device as `par 1tiularly adapted for umarking the angle 'C sofratrsf'I WishI it understood that tflre-vndeyigefiay be used for Vmarking shingle Cuts; as a rafting instrument, for various fipurposespas Aa marking gage; for obtaining lengths of ares of circles, and the chords,

.ifadfluses `and diameters lthereof.

` Nyliat isielainied lis: Y

A carpenftefs square comprising Aa ibody -memberfihaving (a lon itudinal oentral'slot 4anda Lredu'eeduend `ztor`ming a.l transverse .slfi`ulder, said" redu'eed end fbeing provided With' an' Iopening, an 'arm pivotally mounted oni the" .reduced-endet body .member and `dmv-ing a shoulder adjacent its .pivoted end, .a second arm having a longitudinal central slqtsliclable on :the "pivotv of "the first arin and Earrangedto" engage with the .shoulderof thenirst arm to .formtherewith a .rightanglg anlarm pivoted .to the lirst arm and having its 'I other end slidably engaged in .-thefslotof fthe body member V,and provided l with Aan indicator, .and means for Volamliil'lg the first and second arms in right angular relation `and being adapted to" lbe .moved on 'said pivot in such' 1i'elation.

VImtestimony whereof, I affix my signature.` 

